The exine is composed of tectum, columellae, foot layer and endexine.
花粉外
由顶盖层、柱状层、底层及外
层所组成。
;孢子外The exine is composed of tectum, columellae, foot layer and endexine.
花粉外由顶盖层、柱状层、底层及外层所组成。
The exine of pollen wall is of different electron density, the nexine dense and the sexine, comprising tectum, bacules, and foot layer, relatively thin.
花粉的外分为外层和层，外层包括覆盖层、基粒棒和基足层等三层，层只包含一层。
(1)微型月季花粉具有3个萌
，
面观为三裂圆形；
Different cultivars showed different exine sculpture and fringes, luminas and verrucate.
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